US2025076725A1PendingUtilityA1
Simulation method, simulation device, electronic apparatus, and electronic paper display device
Assignee: BEIJING BOE TECHNOLOGY DEV CO LTDPriority: Aug 31, 2023Filed: Aug 31, 2023Published: Mar 6, 2025
Est. expiryAug 31, 2043(~17.1 yrs left)· nominal 20-yr term from priority
G02F 1/1685G02F 2001/1678G02F 1/167
51
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Claims
Abstract
A simulation method is provided, including: obtaining a model parameter information, including a total charge quantity and respective charge volume densities of various charged particles, and an external electric field force; calculating a built-in electric field intensity by using the model parameter information and a pre-constructed model, where an input of the model includes the total charge quantity and the respective charge volume densities of the various charged particles; calculating, based on the built-in electric field intensity, a built-in electric field force acting on each charged particle; simulating a motion of each charged particle according to the external electric field force and the built-in electric field force acting on each charged particle; and determining a display grayscale under the external electric field force to obtain a simulation relationship between display grayscale and external electric field force, in response to the motion of each charged particle stopping.
Claims
exact text as granted — not AI-modified1 . A simulation method for an electronic paper display device, comprising:
a model parameter obtaining step of obtaining a model parameter information, wherein the model parameter information comprises a total charge quantity of various charged particles in the electronic paper display device, respective charge volume densities of the various charged particles, and an external electric field force; a built-in electric field intensity calculation step of calculating a built-in electric field intensity of the electronic paper display device by using the model parameter information and a pre-constructed built-in electric field model, wherein an input of the built-in electric field model comprises the total charge quantity of the various charged particles in the electronic paper display device and the respective charge volume densities of the various charged particles, and an output of the built-in electric field model comprises the built-in electric field intensity; a built-in electric field force calculation step of calculating, based on the built-in electric field intensity, a built-in electric field force acting on each charged particle in the electronic paper display device; a motion simulation step of simulating a motion of each charged particle in the electronic paper display device according to the external electric field force and the built-in electric field force acting on each charged particle in the electronic paper display device; and a grayscale determination step of determining a display grayscale under the external electric field force to obtain a simulation relationship between display grayscale and external electric field force, in response to the motion of each charged particle in the electronic paper display device stopping.
2 . The method according to claim 1 , wherein in the built-in electric field model, the built-in electric field intensity is positively correlated with the total charge quantity of the various charged particles in the electronic paper display device; and/or
wherein in the built-in electric field model, the built-in electric field intensity is positively correlated with the respective charge volume densities of the various charged particles.
3 . The method according to claim 1 , wherein the various charged particles comprise display particles configured to adjust the display grayscale; and
wherein the obtaining a model parameter information comprises obtaining a total charge quantity of the display particles.
4 . The method according to claim 3 , wherein the display particles comprise first-color particles and second-color particles;
the obtaining a total charge quantity of the display particles comprises:
estimating a distribution quantity of the first-color particles and a distribution quantity of the second-color particles;
calculating a total charge quantity of the first-color particles according to the distribution quantity of the first-color particles and an electric charge of a single first-color particle;
calculating a total charge quantity of the second-color particles according to the distribution quantity of the second-color particles and an electric charge of a single second-color particle; and
calculating an average value of an absolute value of the total charge quantity of the first-color particles and an absolute value of the total charge quantity of the second-color particles as the total charge quantity of the display particles.
5 . The method according to claim 3 , wherein the display particles comprise single-color particles; and
wherein the obtaining a total charge quantity of the display particles comprises:
estimating a distribution quantity of the single-color particles; and
calculating a total charge quantity of the single-color particles according to the distribution quantity of the single-color particles and an electric charge of a single single-color particle.
6 . The method according to claim 3 , wherein the display particles comprise first-color particles, second-color particles, and third-color particles; and
wherein the obtaining a total charge quantity of the display particles comprises:
estimating a distribution quantity of the first-color particles, a distribution quantity of the second-color particles, and a distribution quantity of the third-color particles;
calculating a total charge quantity of the first-color particles according to the distribution quantity of the first-color particles and an electric charge of a single first-color particle;
calculating a total charge quantity of the second-color particles according to the distribution quantity of the second-color particles and an electric charge of a single second-color particle;
calculating a total charge quantity of the third-color particles according to the distribution quantity of the third-color particles and an electric charge of a single third-color particle; and
calculating an average value of an absolute value of the total charge quantity of the first-color particles, an absolute value of the total charge quantity of the second-color particles and an absolute value of the total charge quantity of the third-color particles as the total charge quantity of the display particles.
7 . The method according to claim 3 , wherein the various charged particles further comprise charged colloidal particles and polarization charges; and
wherein the obtaining a model parameter information further comprises: obtaining a total charge quantity of the charged colloidal particles; and obtaining a total charge quantity of the polarization charges.
8 . The method according to claim 7 , wherein obtaining a total charge quantity of various charged particles in the electronic paper display device comprises: determining a sum of the total charge quantity of the display particles, the total charge quantity of the charged colloidal particles and the total charge quantity of the polarization charges as the total charge quantity of the various charged particles in the electronic paper display device.
9 . The method according to claim 1 , wherein the various charged particles comprise charged colloidal particles, polarization charges, and display particles configured to adjust the display grayscale; and
wherein the obtaining a model parameter information comprises: obtaining a charge volume density of the display particles; obtaining a charge volume density of the charged colloidal particles; and obtaining a charge volume density of the polarization charges.
10 . The method according to claim 9 , wherein the obtaining a charge volume density of the display particles comprises:
estimating a distribution volume of first-color particles and a distribution volume of second-color particles; obtaining a total charge quantity of the display particles; and calculating the charge volume density of the display particles according to the distribution volume of the first-color particles, the distribution volume of the second-color particles, and the total charge quantity of the display particles; and/or wherein the obtaining a charge volume density of the charged colloidal particles comprises: estimating a distribution volume of the charged colloidal particles; obtaining a total charge quantity of the charged colloidal particles; and calculating the charge volume density of the charged colloidal particles according to the distribution volume of the charged colloidal particles and the total charge quantity of the charged colloidal particles; and/or wherein the obtaining a charge volume density of the polarization charges comprises: estimating a distribution volume of the polarization charges; obtaining a total charge quantity of the polarization charges; and calculating the charge volume density of the polarization charges according to the distribution volume of the polarization charges and the total charge quantity of the polarization charges.
11 . The method according to claim 9 , wherein the obtaining a charge volume density of the display particles comprises: estimating a distribution volume of single-color particles; obtaining a total charge quantity of the display particles; and calculating the charge volume density of the display particles according to the distribution volume of the single-color particles and the total charge quantity of the display particles; or
wherein the obtaining the charge volume density of the display particles comprises: estimating a distribution volume of first-color particles, a distribution volume of second-color particles, and a distribution volume of third-color particles; obtaining a total charge quantity of the display particles; and calculating the charge volume density of the display particles according to the distribution volume of the first-color particles, the distribution volume of the second-color particles, the distribution volume of the third-color particles, and the total charge quantity of the display particles.
12 . The method according to claim 1 , wherein the motion simulation step specifically comprises:
for an i th particle, simulating an accelerated motion of the i th particle and refreshing a position of the i th particle, in response to an absolute value of an external electric field force acting on the i th particle being greater than or equal to a sum of an absolute value of a built-in electric field force acting on the i th particle and an absolute value of a resistance acting on the i th particle.
13 . The method according to claim 12 , wherein the motion simulation step further specifically comprises:
for the i th particle, simulating a decelerated motion of the i th particle and refreshing the position of the i th particle, in response to the absolute value of the external electric field force acting on the i th particle being less than the sum of the absolute value of the built-in electric field force acting on the it particle and the absolute value of the resistance acting on the i th particle.
14 . The method according to claim 13 , further comprising:
determining a relationship between i and a total number N of particles in the electronic paper display device after simulating the accelerated motion or the decelerated motion of the i th particle; and assigning a value of i+1 to i and repeatedly performing the motion simulation step in response to i not being equal to N.
15 . The method according to claim 14 , further comprising:
recalculating the respective charge volume densities of the various charged particles in response to i being equal to N; and repeatedly performing the built-in electric field intensity calculation step, the built-in electric field force calculation step and the motion simulation step based on the recalculated charge volume densities.
16 . The method according to claim 15 , further comprising:
for the i th particle, determining a direction of motion of the i th particle in response to the absolute value of the external electric field force acting on the i th particle being less than the sum of the absolute value of the built-in electric field force acting on the i th particle and the absolute value of the resistance acting on the i th particle; and determining that the motion of the i th particle stops, in response to a determination of the direction of motion of the i th particle being reverse.
17 . The method according to claim 1 , wherein the built-in electric field model is:
E
=
m
Q
s
&&
ρ
1
ρ
2
ρ
3
where E represents the built-in electric field intensity, m is a predetermined constant, s represents a cross-sectional area parallel to a direction of the built-in electric field of a single display pixel in the electronic paper display device, Q represents the total charge quantity of the various charged particles in the electronic paper display device, ρ 1 represents a charge volume density of display particles, ρ 2 represents a charge volume density of charged colloidal particles, ρ 3 represents a charge volume density of polarization charges, and && is an operational symbol indicating a positive correlation between the built-in electric field intensity E and the charge volume densities ρ 1 , ρ 2 and ρ 3 of the various charged particles.
18 . The method according to claim 1 , wherein the built-in electric field model is:
E
=
m
Q
1
(
t
)
s
*
f
1
(
t
)
+
m
Q
2
(
t
)
s
*
f
2
(
t
)
+
m
Q
3
(
t
)
s
*
f
3
(
t
)
where E represents the built-in electric field intensity, m is a predetermined constant, s represents a cross-sectional area parallel to a direction of the built-in electric field of a single display pixel in the electronic paper display device, Q 1 (t) represents a total charge quantity of display particles at time t, f 1 (t) represents a charge volume density of the display particles at time t, Q 2 (t) represents a total charge quantity of charged colloidal particles at time t, f 2 (t) represents a charge volume density of the charged colloidal particles at time t, Q 3 (t) represents a total charge quantity of polarization charges at time t, and f 3 (t) represents a charge volume density of the polarization charges at time t,
wherein the charge volume density f 1 (t) of the display particles at time t is calculated by:
f
1
(
t
)
=
Q
1
(
t
)
(
V
P
1
(
t
)
+
V
P
2
(
t
)
)
z
1
where V P1 (t) represents a distribution volume of first-color particles at time t, V P2 (t) represents a distribution volume of second-color particles at time t, and z 1 is a first volume correction coefficient; and/or
the charge volume density f 2 (t) of the charged colloidal particles at time t is calculated by:
f
2
(
t
)
=
Q
2
(
t
)
(
V
C
1
(
t
)
+
V
C
2
(
t
)
)
z
2
where V C1 (t) represents a distribution volume of positively charged colloidal particles at time t, V C2 (t) represents a distribution volume of negatively charged colloidal particles at time t, and z 2 is a second volume correction coefficient; and/or
the charge volume density f 3 (t) of the polarization charges at time t is calculated by:
f
3
(
t
)
=
Q
3
(
t
)
(
V
PL
1
(
t
)
+
V
PL
2
(
t
)
)
z
3
where V PL1 (t) represents a distribution volume of positive polarization charges at time t, V PL2 (t) represents a distribution volume of negative polarization charges at time t, and z 3 is a third volume correction coefficient.
19 . (canceled)
20 . (canceled)
21 . An electronic apparatus, comprising:
one or more processors; a storage device for storing one or more programs, wherein the one or more programs, when executed by the one or more processors, cause the one or more processors to perform the method of claim 1 .
22 . An electronic paper display device, wherein a relationship between a display grayscale and an external electric field force of the electronic paper display device is determined based on the method of claim 1 ,
wherein the electronic paper display device comprises: a base substrate; a first electrode provided on the base substrate; a second electrode provided on a side of the first electrode away from the base substrate; and charged particles provided between the first electrode and the second electrode; and wherein the charged particles are configured to be driven to a display side under an action of an external electric field applied between the first electrode and the second electrode, so as to achieve a display grayscale meeting the relationship between display grayscale and external electric field force.
23 . (canceled)Join the waitlist — get patent alerts
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